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V. Valence Electrons. A. Valence Electrons Valence electrons – found in the OUTERMOST (highest) energy level (sometimes called a shell) Located in highest.

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Presentation on theme: "V. Valence Electrons. A. Valence Electrons Valence electrons – found in the OUTERMOST (highest) energy level (sometimes called a shell) Located in highest."— Presentation transcript:

1 V. Valence Electrons

2 A. Valence Electrons Valence electrons – found in the OUTERMOST (highest) energy level (sometimes called a shell) Located in highest s and p sublevels These electrons are used for bonding Elements range from having 1 – 8 valence electrons – Example: Nitrogen: 1s 2 2s 2 2p 3 Nitrogen has 2 + 3 = 5 valence electrons

3 B. Valence Electrons From Noble Gas Configurations PRACTICE:# Valence e- Na[Ne]3s 1 Mg[Ne]3s 2 Al[Ne]3s 2 3p 1 Ca[Ar]4s 2 Br[Ar]4s 2 3d 10 4p 5 1 2 3 2 7

4 C. Valence Electrons From Periodic Table

5 D. Lewis Dot Diagrams Lewis Dot Diagrams – way to visually represent valence electrons in an atom. Dots around element symbol = valence electrons Max of 8 electrons around symbol : OCTET RULE

6 2 nd Period Lewis Dot Diagrams Li ON Be FNe B C

7 Practice Write the Lewis Dot Diagram for the following elements – Krypton – Calcium – 1s 2 2s 2 2p 6 3s 2 3p 4 – [Ar] 4s 2 3d 10 4p 5 – Antimony (Sb)

8 Due by the END of Class! Write the Noble Gas Configuration, orbital diagram, and Lewis Dot Structures (valence electrons) for these elements: LiOSiPK SeSrIBaSn


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